<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: CronRunBehavior.class.php 2616 2012-01-16 08:36:46Z liu21st $

class CronRunBehavior extends Behavior {
	protected $options   =  array(
            'CRON_MAX_TIME'=>60,
	);
	public function run(&$params) {
		// 锁定自动执行
		$lockfile	 =	 RUNTIME_PATH.'cron.lock';
		if(is_writable($lockfile) && filemtime($lockfile) > $_SERVER['REQUEST_TIME'] - C('CRON_MAX_TIME')) {
			return ;
		} else {
			touch($lockfile);
		}
		set_time_limit(1000);
		ignore_user_abort(true);

		// 载入cron配置文件
		// 格式 return array(
		// 'cronname'=>array('filename',intervals,nextruntime),...
		// );
		if(is_file(RUNTIME_PATH.'~crons.php')) {
			$crons	=	include RUNTIME_PATH.'~crons.php';
		}elseif(is_file(CONF_PATH.'crons.php')){
			$crons	=	include CONF_PATH.'crons.php';
		}
		if(isset($crons) && is_array($crons)) {
			$update	 =	 false;
			$log	=	array();
			foreach ($crons as $key=>$cron){
				if(empty($cron[2]) || $_SERVER['REQUEST_TIME']>=$cron[2]) {
					// 到达时间 执行cron文件
					G('cronStart');
					include LIB_PATH.'Cron/'.$cron[0].'.php';
					$_useTime	 =	 G('cronStart','cronEnd', 6);
					// 更新cron记录
					$cron[2]	=	$_SERVER['REQUEST_TIME']+$cron[1];
					$crons[$key]	=	$cron;
					$log[] = "Cron:$key Runat ".date('Y-m-d H:i:s')." Use $_useTime s\n";
					$update	 =	 true;
				}
			}
			if($update) {
				// 记录Cron执行日志
				Log::write(implode('',$log));
				// 更新cron文件
				$content  = "<?php\nreturn ".var_export($crons,true).";\n?>";
				file_put_contents(RUNTIME_PATH.'~crons.php',$content);
			}
		}
		// 解除锁定
		unlink($lockfile);
		return ;
	}
}